我可以通过 lshw 获取网络接口的容量，但是这些信息存储在 sysfs 中的哪个文件中（即 /sys/class/net/eth0/device/ 目录中的哪个文件）？
$ sudo lshw -class network
*-network
description: Ethernet interface
product: 82579LM Gigabit Network Connection
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: eth0
version: 04
serial: 3c:97:0e:b4:5c:6a
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=2.3.2-k firmware=0.13-3 latency=0 link=no multicast=yes port=twisted pair
resources: irq:43 memory:f2500000-f251ffff memory:f253b000-f253bfff ioport:6080(size=32)
$ ls /sys/class/net/eth0/device/
broken_parity_status d3cold_allowed enable …